diff --git a/paddle/fluid/API.spec b/paddle/fluid/API.spec
index 14996e3d86a0908cbef3aa0b8b378abb4be7bed2..9f9dbf041090d184c9c80e920487565dc91b7dd1 100644
--- a/paddle/fluid/API.spec
+++ b/paddle/fluid/API.spec
@@ -420,3 +420,17 @@ paddle.fluid.Scope.drop_kids drop_kids(self: paddle.fluid.core.Scope) -> None
 paddle.fluid.Scope.find_var find_var(self: paddle.fluid.core.Scope, arg0: unicode) -> paddle.fluid.core.Variable
 paddle.fluid.Scope.new_scope new_scope(self: paddle.fluid.core.Scope) -> paddle.fluid.core.Scope
 paddle.fluid.Scope.var var(self: paddle.fluid.core.Scope, arg0: unicode) -> paddle.fluid.core.Variable
+paddle.reader.map_readers ArgSpec(args=['func'], varargs='readers', keywords=None, defaults=None)
+paddle.reader.buffered ArgSpec(args=['reader', 'size'], varargs=None, keywords=None, defaults=None)
+paddle.reader.compose ArgSpec(args=[], varargs='readers', keywords='kwargs', defaults=None)
+paddle.reader.chain ArgSpec(args=[], varargs='readers', keywords=None, defaults=None)
+paddle.reader.shuffle ArgSpec(args=['reader', 'buf_size'], varargs=None, keywords=None, defaults=None)
+paddle.reader.firstn ArgSpec(args=['reader', 'n'], varargs=None, keywords=None, defaults=None)
+paddle.reader.xmap_readers ArgSpec(args=['mapper', 'reader', 'process_num', 'buffer_size', 'order'], varargs=None, keywords=None, defaults=(False,))
+paddle.reader.PipeReader.__init__ ArgSpec(args=['self', 'command', 'bufsize', 'file_type'], varargs=None, keywords=None, defaults=(8192, 'plain'))
+paddle.reader.PipeReader.get_line ArgSpec(args=['self', 'cut_lines', 'line_break'], varargs=None, keywords=None, defaults=(True, '\n'))
+paddle.reader.multiprocess_reader ArgSpec(args=['readers', 'use_pipe', 'queue_size'], varargs=None, keywords=None, defaults=(True, 1000))
+paddle.reader.Fake.__init__ ArgSpec(args=['self'], varargs=None, keywords=None, defaults=None)
+paddle.reader.creator.np_array ArgSpec(args=['x'], varargs=None, keywords=None, defaults=None)
+paddle.reader.creator.text_file ArgSpec(args=['path'], varargs=None, keywords=None, defaults=None)
+paddle.reader.creator.recordio ArgSpec(args=['paths', 'buf_size'], varargs=None, keywords=None, defaults=(100,))
diff --git a/paddle/scripts/paddle_build.sh b/paddle/scripts/paddle_build.sh
index 54070d6ae1cc70b9082159b977ba570d50f80785..70d37d30321a5f49a01d7b4ab3629d3ee9654c46 100755
--- a/paddle/scripts/paddle_build.sh
+++ b/paddle/scripts/paddle_build.sh
@@ -474,12 +474,15 @@ function assert_api_not_changed() {
     virtualenv .env
     source .env/bin/activate
     pip install ${PADDLE_ROOT}/build/python/dist/*whl
-    python ${PADDLE_ROOT}/tools/print_signatures.py paddle.fluid > new.spec
+    python ${PADDLE_ROOT}/tools/print_signatures.py paddle.fluid,paddle.reader > new.spec
     if [ "$1" == "cp35-cp35m" ] || [ "$1" == "cp36-cp36m" ] || [ "$1" == "cp37-cp37m" ]; then
         # Use sed to make python2 and python3 sepc keeps the same
         sed -i 's/arg0: str/arg0: unicode/g' new.spec
         sed -i "s/\(.*Transpiler.*\).__init__ ArgSpec(args=\['self'].*/\1.__init__ /g" new.spec
     fi
+    # ComposeNotAligned has significant difference between py2 and py3
+    sed -i '/.*ComposeNotAligned.*/d' new.spec
+
     python ${PADDLE_ROOT}/tools/diff_api.py ${PADDLE_ROOT}/paddle/fluid/API.spec new.spec
     deactivate
 }
diff --git a/tools/print_signatures.py b/tools/print_signatures.py
index e2805c4e7e6aa26a5865b64a874feef672bf9b36..5c5266f904f5dcf74dd1d4ee7e98081f74a79907 100644
--- a/tools/print_signatures.py
+++ b/tools/print_signatures.py
@@ -15,7 +15,7 @@
 Print all signature of a python module in alphabet order.
 
 Usage:
-    ./print_signature  "paddle.fluid" > signature.txt
+    ./print_signature  "paddle.fluid,paddle.reader" > signature.txt
 """
 from __future__ import print_function
 
@@ -43,7 +43,8 @@ def visit_member(parent_name, member):
                 line.strip() for line in pydoc.render_doc(member).split('\n')
                 if "->" in line
             ])
-
+    elif inspect.isgetsetdescriptor(member):
+        return
     else:
         raise RuntimeError("Unsupported generate signature of member, type {0}".
                            format(str(type(member))))
@@ -63,7 +64,9 @@ def visit_all_module(mod):
             visit_member(mod.__name__, instance)
 
 
-visit_all_module(importlib.import_module(sys.argv[1]))
+modules = sys.argv[1].split(",")
+for m in modules:
+    visit_all_module(importlib.import_module(m))
 
 for name in member_dict:
     print(name, member_dict[name])